import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)
const routes = [
  {path:'/',redirect:'./login'},
  { path: '/login', component: Login },
  {path: '/home', component: Home}
]
const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行
  // next() 放行   next('/login')强制跳转
  if (to.path === '/login') return next()
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})


export default router
